This is an amazing idea for a poem, and I commend you on the way you went through with it. You made a somewhat base topic (in a good way!) full of life and meaning. Very good. Grammatically: 'Where is centre?' sounds weird, I think it should be 'Where is the centre?' and the same thing with the reader, writer and...well that's it. I can't find anything else! Great poem!

Excellent one...........

keep writting